

public class J20240213 {
    public static void main(String[] args) {
        boolean
    }
    public static void main2(String[] args) {
        char a = 'A';
        char b = '张';
        System.out.println(a);
        System.out.println(b);
    }
    public static void main1(String[] args) {
        float a = 12.5f;//不加f会报错不通过
        System.out.println(a);
        System.out.println(Float.MAX_VALUE);
        System.out.println(Float.MIN_VALUE);
    }
}
